pan and scan
a technique for changing the aspect ratio of a wide-screen film, usually by selecting the significant section of each film frame and cropping the sides, so that it can be transmitted in 4:3 aspect ratio.
Compare letterbox(def 2).
Related formspan-and-scan, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019